带有前级DC/DC变换器与逆变器相互作用分析

研究了DC／DC变换器与逆变器之间的相互作用问题。由于逆变器负栽非线性特性，DC／DC变换器输出电压产生较大纹波，反过来又影响逆变器交流输出的动态性能。给出带逆变器负载时DC／DC变换器电感电流两种工作模式：快速跟踪模式与平均跟踪模式，快速跟踪模式有利于减小DC／DC变换器输出电压纹波，改善逆变器交流输出效果。实验结果验证了理论分析的正确性。

Interaction Analysis Between DC/DC Converter and Inverter

When an inverter is operated from a DC/DC converter, th e possibility exists on undesirable interactions between DC/DC converter and in verter. Consequently, to ensure the effective operation of the entire power syst em, the interactions are analyzed. DC/DC converter output voltage contains plen tiful low-frequency ripple caused by the nonlinear inverter load. In reverse, t he ripple causes bad step load response: inverter output voltage is distorted an d dynamic performance is degraded. Two kinds of inductor current operate mode of DC/DC converter with the inverter load are proposed i.e. quick trace mode and average trace mode. Under condition that the capacitor on the input port of the inverter is unchanged, the quick trace mode is propitious to minish DC/DC conve rter output voltage ripple and to improve dynamic performance of the inverter. F inally, experimental results prove the accuracy of theoretical analysis confirms .